An app for Windows Phone that people had longed for was the Audible app. Many people, including Paul Thurrott, had been working with a beta version of the application and a supposed release date in April had come and gone.

Finally, during the keynote talk at this week’s Windows Phone Summit, the Audible app for Windows Phone was announced. Originally, it appeared that the app would be available the same day as the Summit. It did finally release, today, and bills itself as being built from the ground up to take advantage of what Windows Phone 7.5 has to offer.

Here’s a sample of some of the features available with the app:

* Bookmarking, Sleep Mode, Button Free Mode, and Play as you Download

* Earn badges and track your personal listening habits

* Browse and discover 100,000+ digital audiobooks and more in the Audible mobile store; from best sellers to timeless classics, and everything between

* Connect to Facebook and Twitter to let your friends know what you’re listening to

* Get insider information about author events and more with the Audible Newsfeed